Chimney-cap or conical ventilator



P. LEAR.

Chimney Cap.

Patented Jany 23`, 1866.

' Unire Srarns Arnnr rtree.

PETER LEAR, OF MEDFORD, MASSACHUSETTS.

CHIlVINEYiCAP OR CONICAL VENTILATOR.

Specitication forming part of Letters Patent No. 52, 177, dated January 23, 1866.

ca1 section, of it, and Fig. 3 is a horizontal section, taken through the propelling or wind wheel of it.

In such drawings, A is a conical case, having its larger end upward. At its lower or le 15er end the case is connected to a supportjie, B, across the lower part of which a bar,

s arranged and fixed, such barserving to support the step or bearing b of a vertical spindle, C, whose upper end is pivoted on a rod, c, extending through an arched bar, d, such bar being arranged with respect to the case as shown in Figs. l and 2. The arched Y bar dis fastened at or near its two ends to the upper part of the case.

A short distance above the case there is a wind-wheel, D, consisting of a series of angular buckets or plates, e e, disposed in a circle, and affixed to and projecting down from a concavo-convex or conical disk or capj, which is fastened to the spindle concentrically therewith.

Furthermore, there extends from that portion of the spindle which is within the case C one or more trapezoidal wings or plates, g g, which rotate with the spindle and its windwheel, and are rotated by the action of the wind against the buckets of the latter.

A socket-tube, F, fixed to applate, G, to cap a chimney or flue, and being open at each end, receives the support-tube B and serves to sustain the remainder of the apparatus.

Then the wind may be blowing against the buckets of' the wheel it will set the wheel and the wings gg in revolution. These wings, by their action against the air within the case, will force it against the inner inclined surface of such case, which will deflect it upward toward and into the wind-wheel and the space between it and the case; from thence it will be discharged into the surrounding atmosphere. In this way an upward current or draft will be induced through the apparatus, and smoke or noxious air or gases be extracted from a iiue 0r apartment when in communication with the apparatus.

Were the case C cylindrical it would not, like a conical case, deiiect upward all the air thrown against it, but would tend to throw much of such air downward into the iiue. Thus there is a great advantage gained by a conical over a cylindrical case when employed with a wind-wheel and a set of wings, or the equivalent thereof. Vhen a cylindrical case has been so used with a wind-wheel arranged over it it has become necessary to employ a screw-propeller, or its equivalent, in the case, as such propeller, by its peculiar action, produced the upward current. By using the fulcrum-plate wings and a conical case, as hereinbefore described, we not only are able to simplify the apparatus and cheapen its construction, but we produce by the case the upward deflection of the centrifugal currents of air thrown against its inner surface.

By inverting the wings and conical case and arranging the wind-wheel at a distance above the latter, and opening the largerv end of the case into a support-tube, and properly sustaining the spindle so that the wind-wheel may be capable of revolving, we shall prepare the apparatus for forcing air downward into a iiue, and thus be able to make use of it to propel fresh air into an apartment or the hold of a vessel when in communication therewith.

Having thus described my invention, what I claim is as follows:

l. The combination aswell as the arrangement of the stationary conical case A with one or more rotary wings, g, anda wind-wheel, D, or buckets and cap, applied to the spindle C.

2. The combination as well as the arrangement of the support-tube B with the stationary conical case A, one or more rotary wings, g, and a wind-wheel, D, applied to spindle C.

3. The combination as well as the arrangement of the socket-tube F, applied or to be applied to the chimney, with the support-tube B, the stationary conical case A, and one or 5. The application of the pivot-supporting more rotary wings, g, and a Wind-Wheel, D, arbar d directly to the conical case A, having;`

ranged as specified. one or more rotary wings, g, and a Wind-Wheel, -4. The application of the step-bar a of the D, arranged and combined with it, as specified. spindle to the support-tube B, when combined PETER LEAR With a conical case, A, having,` one or more rotary Wings, g, and a wind-wheel, D, arranged Witnesses:

With respect to it and applied to a spindle, C, R. H. EDDY,

as described. F. P. HALE, J r. 

